Electrode for flaming-arc lamps.



v 0. W. HILL. ELECTRODE FOR FLAMING ARC LAMP S. APPLICATION FILED SEPT.2 1, 1910'.

1,007,869; Patent dN0v.7,1911.

{WWW7 'W/ AF'F'PI 'I' 14-069mm I "ST TE To all whom itmcy concern:

Be it known that 1, CHARLES W. HILL,-a-

use will automatically, so to speak, produce flan are which changes in color from time to time. i

Generally speaking, the invention comprises. the elements and combinations thereof. shown in the accompanying drawings.

Reference should; be had to the accompanying drawing formingspecification in whichv Figure 1 is a horizontal cross section of the showing in Fig. 2; Fig. 2 is an elevation partly in section of an electrode constructed in accordance with this invention showing 28 the flame producing material arranged in different manners; Fig. 3 shows a portion of an electrode in cross. section which is cored and the core space is filled with the color producing material. Fig. 4 shows a .30 portion in section of an electrode composed of a plurality of individual electrodes'which are associated together. Fig. 5 shows a fluted electrode of special form in which the spaces are filled with the color producing material. Figs. 6 and 7 are elevations partly in section of differentforms the electrode may assume. Fig. 8 is a cross section of a further modified form ofelectrode.

It is a well known fact that certain substances introduced into an arc impart a characteristic color to the arc stream, as, for example, certain calcium salts impart a yellow color, certain lithium and strontium salts impart a red color. Therefore, if portions of various color-producing substances be incorporatedin an electrode, the arc will attack these substances as the electrode is consumed, and the substance thus, attacked will volatilize and produce its characteristic color in the arc stream.

It is preferred to so incorporate the vanous substances with the electrode that the arc will successively assume a different color. There are a multitude of ways in which the o color producing material may be incorpo- Specification of Letters Patent.

a portion of this.

Parana ormcn.

nrnnor'rnnnwoon-onro, Assrsnon To nnrronAncAnBoN COMPANY.

or cLnvn Aun, OHIO,'ACORPOBATIO1\T on; NEW JERSEY.

ntnorncnn ron. FLAIWIING-ARC LAMPS.

Patented Nov: 7, 191 1.

g Application filed September 21, 1910. Serial No. 582,980.

rated in the electrode, land'it will be quite impracticable to set them all forth; However, the more clearly to present the invention, the following illustrations are given. The body of the electrode may be constructed as illustrated at D in Figsl and 2, wherein the carbon is composed of a series ofrlngs. which encircle each other, the mate.- rial in each ring being impregnated with a substance which produces the; color desired. -lVhen the arc shifts from ring to'ring, the difierent color effects will'be produced. If, for instance, the are be in contact'with the outer ring, a certain color, say red, will be imparted to the arc stream, then when the arc shifts to another ring, for instance, the next to-the outer ring, the color of the arc will becchanged, say'to green. This succession of changes will take place as the arc moves from ring to ring.

In Fig. 6 is shown a difierent manner of incorporating the coloring material, namely, in the form of pellets C and where this is done, the pellets are scattered promiscuously throughout the length of the carbon. The pellets will contain the coloring substances and as the electrode is consumed, a pellet imparting say a yellow color will be conimparting say a green' color.

In Fig. 7 the body is shown as composed of a series of sections or segments as represented at A and' B. Each of the adjacent segments containing a different coloring ma terial. So long as the arc is in contact with the segment A a definite'color will be given to the arc; we will say that it is blue. When, however, the section A is consumed and the arc contacts the section B, then the particular material with which this section is impregnated manifests itself and imparts its characteristic color to the arc, which may be yellow.

The manner of incorporating the color producing material just described has been shown in connection entirely with a solid carbon, but it will be perfectly obvious that cored carbon can be utilized in a similar manner and produce the same result. That is to say, the core may be filled withjyimaterial arranged as shown at A and B, or with material arranged as shown at C and D, and produce the same result as far as the color of the arc is concerned. Again, in addition to the core, the body of the carbon itself may vsumed and immediately following a pellet be impregnated with color producing material arrangedin any of the ways orvcombinations thereof suggested in Figs. 2, 6 and 7. In F 3 is shown a solid carbon E which 'is, provided with a plurality of'cored portions F. These cored portions are filled with a suitable :mixture which contains a color producing substance, and if desired, the various cores will be filled with ,substances which produce ,difierent'colors. In Fi 4 there'is illustrated an electrode formed from a series-of individual'electrodes G, H, I and; J which are assembled so'as' to forma unitary electrode. Each of these 5 individuaLmembe'rs of the electrodes G, H,

' I and J maybe a solid carbon, of any desired shape of cross section, as shown at H and J, or any .or "all maybe cored carbons,

as are the, members'Gr and I. The solid carbons H and J may be made up as indicated with respect to; Fig. 2, and the cored carbons may be'mlade up the same as before described with respect tothe cored carbon, and if it be desired, the portions of the memhere (3% and Iwhich are solid maybe impregnated with flame producing material inany manner, such as shown in Fig. 2.

In Fig. 5 is illustrated still another form of electrode, which comprisesa body K formed with a plurality of radiating arms, the spaces between the arms being filled with a mixture impregnated with color producing'material, and, if desired, a different color'ing material may be incorporated in each. of the difierent portions of the mix which changes.

fill the spaces between' the arms and in the shell itself, if desired.

In Fig. 8, the electrode shown has a regular carbon body in which fiamin material may be incorporated,-if desired. Iixt'ending through the body portion are'other carbon bodies containing flaming material which maybe'constructed in a manner similar to 'the forms ofelectrodes heretofore described.

The invention ,may be embodied in electrodes differing in their precise construction from: those herein shown and described, and therefore I do not limit myself to any exact 'constructio'n'except as defined in the claims.

2. An electrode for flamin arc lamps in which are incorporated in d1 erent ortions thereof, different substances the voatilization of each of which imparts to the arc stream a characteristic color whereby a succession ot color changes is lmparted to the are as the electrode 15 consumed.

In testimony whereof,I hereunto afiix my signature in the presence of two witnesses.

CHARLES HILL. 7 Witnesses? F. D.-LAURENoE-,' C. E. B'nRKE'r'r. 

